A Roman Denarius

I received a gift today from my son of a Roman Denarius coin. It is purported to be a silver coin issued in Rome between 211 and 238 BC.  The silver denarius was first issued in 211 BC as part of a coinage reform.  It contained approximately 4.5 grams of silver and was worth 10 asses, hence the name meaning "ten".

The inscriptions on the coin lead me to believe this coin is from a later date during the imperial era.

About Sleep

 I will be posting interesting articles and videos about sleep here.  I have coauthored two academic papers on the intersection of sleep and economic choice, which is why I find this subject so interesting.

• “A Model of Sleep in Two Mammalian Species: Interacting Circadian and Homeostatic Processes with Opportunity Cost,” (joint with James Cardon, Eric Eide, and Mark Showalter), PLOS ONE, vol. 13 no. 12 (2018).
• "A Model of Sleep, Leisure and Work over the Business Cycle," (joint with James Cardon, Eric Eide, and Mark Showalter), Journal of Economic Dynamics and Control, vol. 95 (2018) pp. 19-36.

Interesting Science

 I'll be posting links to interesting articles and videos I find related to science and engineering.

Here is the first one Aug. 17, 2023: